Reproducible: Always Steps to Reproduce: 1. Enable Desktop Grid + Present Windows Effect 2. Check the "Use Present Windows Effect to layout the windows" 3. Show the Desktop Grid 4. Drag a non maximized window Actual Results: The window disappear during movement. Expected Results: The window follows the mouse pointer the same way as for maximized windows (or when "Use Present Windows Effect to layout the windows" is unchecked).
*** This bug has been marked as a duplicate of bug 364509 ***